ERROR: (device loop5): remounting filesystem as read-only netlink: 144 bytes leftover after parsing attributes in process `syz.5.197'. ------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:784:21 index -1 is out of range for type 'struct dtslot[128]' CPU: 1 UID: 0 PID: 7883 Comm: syz.5.197 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 ubsan_epilogue+0x14/0x48 lib/ubsan.c:233 __ubsan_handle_out_of_bounds+0xd0/0xfc lib/ubsan.c:455 dtSearch+0x1664/0x1d00 fs/jfs/jfs_dtree.c:784 jfs_lookup+0x13c/0x32c fs/jfs/namei.c:1461 lookup_open fs/namei.c:4413 [inline] open_last_lookups fs/namei.c:4540 [inline] path_openat+0x1038/0x3114 fs/namei.c:4784 do_filp_open+0x18c/0x36c fs/namei.c:4814 do_sys_openat2+0x11c/0x1f0 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1447 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 ---[ end trace ]--- ================================================================== BUG: KASAN: slab-out-of-bounds in addressPXD fs/jfs/jfs_types.h:80 [inline] BUG: KASAN: slab-out-of-bounds in dtSearch+0x1680/0x1d00 fs/jfs/jfs_dtree.c:785 Read of size 4 at addr ffff0001066c5fe0 by task syz.5.197/7883 CPU: 1 UID: 0 PID: 7883 Comm: syz.5.197 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_address_description+0xa8/0x238 mm/kasan/report.c:378 print_report+0x68/0x84 mm/kasan/report.c:482 kasan_report+0xb0/0x110 mm/kasan/report.c:595 __asan_report_load4_noabort+0x20/0x2c mm/kasan/report_generic.c:380 addressPXD fs/jfs/jfs_types.h:80 [inline] dtSearch+0x1680/0x1d00 fs/jfs/jfs_dtree.c:785 jfs_lookup+0x13c/0x32c fs/jfs/namei.c:1461 lookup_open fs/namei.c:4413 [inline] open_last_lookups fs/namei.c:4540 [inline] path_openat+0x1038/0x3114 fs/namei.c:4784 do_filp_open+0x18c/0x36c fs/namei.c:4814 do_sys_openat2+0x11c/0x1f0 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1447 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Allocated by task 6948: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:78 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:570 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_noprof+0x344/0x680 mm/slub.c:5270 anon_vma_chain_alloc mm/rmap.c:141 [inline] anon_vma_clone+0x90/0x470 mm/rmap.c:287 anon_vma_fork+0x80/0x478 mm/rmap.c:350 dup_mmap+0x7e4/0x1798 mm/mmap.c:1790 dup_mm kernel/fork.c:1529 [inline] copy_mm+0x100/0x438 kernel/fork.c:1581 copy_process+0x1474/0x32fc kernel/fork.c:2221 kernel_clone+0x1d8/0x84c kernel/fork.c:2651 __do_sys_clone kernel/fork.c:2792 [inline] __se_sys_clone kernel/fork.c:2760 [inline] __arm64_sys_clone+0x144/0x1a0 kernel/fork.c:2760 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Freed by task 7881: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:78 kasan_save_free_info+0x58/0x70 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x74/0xa4 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2540 [inline] slab_free mm/slub.c:6670 [inline] kmem_cache_free+0x184/0x6e4 mm/slub.c:6781 anon_vma_chain_free mm/rmap.c:146 [inline] unlink_anon_vmas+0x224/0x520 mm/rmap.c:420 free_pgtables+0x3d0/0x5dc mm/memory.c:414 exit_mmap+0x344/0xaac mm/mmap.c:1288 __mmput+0xec/0x3fc kernel/fork.c:1173 mmput+0x70/0xac kernel/fork.c:1196 exec_mmap+0x32c/0x3f0 fs/exec.c:901 begin_new_exec+0x6b4/0x1368 fs/exec.c:1156 load_elf_binary+0x6d8/0x1de4 fs/binfmt_elf.c:1010 search_binary_handler fs/exec.c:1669 [inline] exec_binprm fs/exec.c:1701 [inline] bprm_execve+0x788/0x11c4 fs/exec.c:1753 do_execveat_common+0x6ac/0x834 fs/exec.c:1859 do_execve fs/exec.c:1933 [inline] __do_sys_execve fs/exec.c:2009 [inline] __se_sys_execve fs/exec.c:2004 [inline] __arm64_sys_execve+0x9c/0xb4 fs/exec.c:2004 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 The buggy address belongs to the object at ffff0001066c5f50 which belongs to the cache anon_vma_chain of size 80 The buggy address is located 64 bytes to the right of allocated 80-byte region [ffff0001066c5f50, ffff0001066c5fa0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1466c5 memcg:ffff0000f994fc01 flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000000 ffff0000c18b8280 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000240024 00000000f5000000 ffff0000f994fc01 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0001066c5e80: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb ffff0001066c5f00: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb >ffff0001066c5f80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0001066c6000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0001066c6080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== ERROR: (device loop5): dtSearch: stack overrun! btstack dump: bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 0, index = 0 jfs_lookup: dtSearch returned -5 ERROR: (device loop5): dtSearch: stack overrun! btstack dump: bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 0, index = 0 jfs_lookup: dtSearch returned -5 ERROR: (device loop5): dtSearch: stack overrun! btstack dump: bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 0, index = 0 jfs_lookup: dtSearch returned -5 ERROR: (device loop5): dtSearch: stack overrun! btstack dump: bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 0, index = 0 jfs_lookup: dtSearch returned -5 netlink: 52 bytes leftover after parsing attributes in process `syz.5.197'.